Examine source code of Fantasy forest

{
  "theme": {
    "images": {
      "theme_frame": "h_fantasyforest.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Fantasy forest",
  "manifest_version": 2,
  "description": "Fantasy forest, Nature, Winter, snow, mist, trees, December, Christmas, white, grey, blue"
}